Quick question about grading


I tried to search for some info about the grading rule for the final grades after the final. Currently, I have almost finished HW09 and I am checking if there is anything wrong. Just want to calculate how many scores I need to get to finish the course with distinction. Can anybody tell me where I can find them? I saw from one thread that the final score is made up of 75% homework + 25% final exam. Does each homework have the same weight and does the score of each quiz count?